Abstract: An improved technique for acoustic sensing involves, in one embodiment, launching into a medium, a plurality of groups of pulse-modulated electromagnetic-waves. The frequency of electromagnetic waves in a pulse within a group differs from the frequency of the electromagnetic waves in another pulse within the group. The energy scattered by the medium is detected and, in one embodiment, may be used to determine a characteristic of the environment of the medium. For example, if the medium is a buried optical fiber into which light pulses have been launched in accordance with the invention, the presence of acoustic waves within the region of the buried fiber can be detected.

Abstract: An improved technique for acoustic sensing involves, in one embodiment, launching into a medium, a plurality of groups of pulse-modulated electromagnetic-waves. The frequency of electromagnetic waves in a pulse within a group differs from the frequency of the electromagnetic waves in another pulse within the group. The energy scattered by the medium is detected and, in one embodiment, the beat signal may be used to determine a characteristic of the environment of the medium. For example, if the medium is a buried optical fiber into which light pulses have been launched in accordance with the invention, the presence of acoustic waves within the region of the buried fiber can be detected.

Abstract: An improved technique for acoustic sensing involves, in one embodiment, launching into a medium, a plurality of groups of pulse-modulated electromagnetic-waves. The frequency of electromagnetic waves in a pulse within a group differs from the frequency of the electromagnetic waves in another pulse within the group. The energy scattered by the medium is detected and, in one embodiment, the beat signal may be used to determine a characteristic of the environment of the medium.

Abstract: A method for identifying a test compound that has an anti-tumoral effect whilst not significantly activating unrelated transduction signals, the method comprising the steps of: (a) selecting at least one test compound; (b) assaying the compound for anti-tumoral effect; (c) selecting at least one distinct intracellular event which is modulated, at least partially, by the GnRH receptor; (d) testing for the ability of said test compound not to modulate the selected intracellular event; and (e) selecting the test compound which selectively demonstrates an anti-tumoral effect and does not modulate said other selected intracellular event.

Abstract: An improved technique for acoustic sensing involves, in one embodiment, launching into a medium, a plurality of groups of pulse-modulated electromagnetic-waves. The frequency of electromagnetic waves in a pulse within a group differs from the frequency of the electromagnetic waves in another pulse within the group. The energy scattered by the medium is detected and, in one embodiment, may be used to determine a characteristic of the environment of the medium.

Abstract: A computer-implemented method separates first and second portions of a tooth by defining a cutting surface intersecting the first and second portions by specifying two points; and applying the cutting surface to the tooth to separate the tooth into two portions.

Abstract: A computer-implemented method separates first and second portions of a tooth by defining a cutting surface intersecting the first and second portions by specifying two points; and applying the cutting surface to the tooth to separate the tooth into two portions.

Abstract: A computer-implemented method separates first and second portions of a tooth by defining a cutting surface intersecting the first and second portions by specifying two points; and applying the cutting surface to the tooth to separate the tooth into two portions.

Abstract: A virtual peak register system is provided that allows individuals who have climbed various mountains to record and display information concerning their ascents over the Internet. The information recorded can be displayed in the form of a general peak register or a personal peak register. The general peak register can display information that includes the names of the individuals who have climbed a particular mountain and the dates of their respective climbs, the information being displayed in reverse chronological order. The personal peak register can display information that includes the names and dates of mountains personally climbed by an individual. The personal peak register can display the information concerning the individual's ascents according to any number of criteria, such as the elevations of the mountains climbed or the dates of the climbs.

Abstract: A computer-implemented method separates first and second portions of a tooth by defining a cutting surface intersecting the first and second portions by specifying two points; and applying the cutting surface to the tooth to separate the tooth into two portions.